I recently update the system(12.10) on my laptop and after that whenever I plug the power cable in to my laptop it freezes and has no function of the mouse or the keyboard. I have to reboot the laptop and after that it's fully functional.(with the power cable plugged in.)

I need help to troubleshoot this problem or to report it as a bug if that is required.

It seems to me a bug related to kernel and acpi. I would try booting an older kernel first and see if the problem is related to a kernel update.
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To DoDec 18 '12 at 15:13

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Try booting with the acpi=off option. In Grub press e and add it to the line containing quiet splash and report back.
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To DoDec 22 '12 at 9:10

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Do you have Jupiter installed in your system?
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MukundDec 30 '12 at 17:22

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if you have it installed in your system i advise you to uninstall it. because even i had faced the same problem in 12.10..once i removed jupiter the problem was resolved
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MukundDec 30 '12 at 17:32

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@Mukund : Yeah I had Jupiter installed in my system and now I had removed it and my system works perfectly. No more freezing, So thanks a lot. Is this means I can't use Jupiter anymore? Is there any bug-fixed version of Jupiter.? Thanks again..!
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SudheeraJan 7 '13 at 3:52

its not a problem wit ubuntu
some laptops tend to freeze when connected by power when charge is more than 75%
restarting consumes power and it works fine agai
to solve te problem just connect before starting
there mightbe a bugfix from your BIOS

Thanks for the reply, Can you explain how editing GRUB is related with the power problem? however I removed "Jupiter" and now my system works fine. thanks for replying...
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SudheeraJan 7 '13 at 4:07

Had the same problem again. Empirically, I noticed that I had inserted an SD card and had a GNOME extension to show and unmount removable media on the top panel. I turned off the extension, the problem went away. Seems to me that it is a problem with GNOME 3 and extensions/indicators on the top panel, since your problem was with jupiter (which is an extension or indicator program) and mine with this "Removable drive menu" extension. It has something to do with the battery indicator when you plug/unplug, as if it doesn't get along with other indicators/menus. Have to say I'm new to linux.
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S.MaldiniJan 7 '13 at 4:38

This is a bug, and should be reported as one. If you find (or someone else reports) an effective workaround, that can be included in the bug report. As per the FAQ, bugs are off-topic on Ask Ubuntu, so the only part of this question that should really be addressed here is the issue of how to report this bug. Detailed work and troubleshooting on bugs in Ubuntu needs to happen on Launchpad; otherwise, valuable work tends to be ignored and fragmented.

Power management functionality is part of the kernel, so the correct way to report this bug is to run ubuntu-bug linux. Detailed technical information will be sent to Launchpad, but you will still have to describe the problem, including anything you've tried and what happened, in as much detail as possible.

One common mistake is to report power management bugs against the acpi package. That's not the right way, since the acpi package doesn't actually perform any power management; it's just an interface for getting information about the power management that is happening in the kernel (Linux).

I recommend that you:

Trigger the problem.

Record the time that you triggered it.

(Re)boot your Ubuntu system.

Once booted back up, immediately report the bug.

Indicate that you have done all this in your bug report, and specify the time (or approximate time) you triggered the freeze.

That may make it easier for triagers, developers, and other interested persons to identify entries in automatically attached log files that pertain to the problem.

Finally, please note that if you are reporting this bug against the downstream kernel (linux in Ubuntu, reporting on Launchpad, as described here), you must be running (and you should have last produced the bug using) this version of the kernel, and not a custom-built or upstream kernel.org version.

If you report this bug or find it already reported, feel free to subscribe me to the bug if you wish.

Thanks for this detailed reply, That's very kind of you. However I removed Jupiter from my system(as suggested by @Mukund), and then the system works fine. Do you think still I have to report this as a bug, because of course people will need to use Jupiter with Ubuntu without any problem. So what do you think..? thanks.
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SudheeraJan 7 '13 at 4:04

@Sudheera I don't think you are obligated to report this as a bug. But if you choose to do so, I think it would be helpful. (Search first--which is explained in the bug reporting resources linked to in my answer--to see if it's already been reported. If it has then you can subscribe and indicate you're affected, and, if you have any valuable information not present in the existing bug, comment with it.) I still recommend reporting the bug. BTW hopefully Mukund will post the solution as an answer soon so it can receive the bounty (as that appears to have solved the problem for you).
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Eliah KaganJan 7 '13 at 4:14

Unfortunately I'm not sure which of the two methods did fix the issue, since I changed them both before going into reboot. However, unchecking a unnecessary feature in pm-utils is always a good idea, and updating to a new (stable) kernel too.